Currently Being ModeratedOct 23, 2013 11:20 AM (in response to boxerissimo)
As wifiguru suggests, check the steps for resetting the SMC. My MBP had some problems enabling Wi-Fi and it was enough just to shotdown the MBP, removing and re-inserting the battery and start it up. If it doesn't work proceed with the SMC reset.
Here you have extra info: